Review on ADIGARAUTO 419 000 Automatic Tensioner Compatible by Christopher Theriault

I was able to install it easily, it came out exactly like the original part. But when I tried to install the belt, the tensioner tongue popped. What is the purpose of the tensioner? For attaching a tensioner to the V-ribbed belt AND for slackening the V-ribbed belt for removal and installation. If he can't, it's crap. Don't buy this junk.